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Structure of hybrid protoneutron stars within the Nambu--Jona-Lasinio model

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arxiv 0710.5384 v2 pith:D4PC5HNL submitted 2007-10-29 astro-ph nucl-th

G.F.Burgio , S. Plumari (INFN Sezione di Catania , Dipartimento di Fisica e Astronomia , Universita' di Catania , Italy) This is my paper · ORCID
classification astro-phnucl-th
keywords protoneutronstarshadronichybridmassesmattermodelnambu--jona-lasinio
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abstract

We investigate the structure of protoneutron stars (PNS) formed by hadronic and quark matter in $\beta$-equilibrium described by appropriate equations of state (EOS). For the hadronic matter, we use a finite temperature EOS based on the Brueckner-Bethe-Goldstone many-body theory, with realistic two- and three-body forces. For the quark sector, we employ the Nambu--Jona-Lasinio model. We find that the maximum allowed masses are comprised in a narrow range around 1.8 solar masses, with a slight dependence on the temperature. Metastable hybrid protoneutron stars are not found.

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